xt7jm61bmn4r https://nyx.uky.edu/dips/xt7jm61bmn4r/data/mets.xml   Kentucky Agricultural Experiment Station. 1921 journals kaes_circulars_001_1_089 English Lexington : The Service, 1913-1958. This digital resource may be freely searched and displayed.  Permission must be received for subsequent distribution in print or electronically.  Physical rights are retained by the owning repository.  Copyright is retained in accordance with U. S. copyright laws.  For information about permissions to reproduce or publish, contact the Special Collections Research Center. Kentucky Agricultural Experiment Station Circular (Kentucky Agricultural Experiment Station) n. 089 text Circular (Kentucky Agricultural Experiment Station) n. 089 1921 2014 true xt7jm61bmn4r section xt7jm61bmn4r v.
V
COLLEGE OF AGRICULTURE
xx. —:i~r _ _ _ _
:1:11111:Q EXICHSIOD DIVISIOD
\l|` IIN.
Hr'! ='~ THOMAS P. COOPER, Dean and Director
CIRCULAR NO. 89.
Wildfire and Angular Leaf-Spot of Tobacco
Ny
\\'. D \`ALLE.~\U
Lexington, Ky.
February, 1921
I‘uI»lisln·iI in i··»nn·~i·Ii·»n with tho IIQI`It‘IIIIIII`&II ¢~xn~nsi·¤n work u;1rri··iI
"II I'? <‘·*—~x···r:iii·~n or any ¢‘·»11.·;r» nr _\;ri.·n1inri», 1'niwrsixy of Kunxur-lay.
I‘.lII1[IIq· I'. S. I*l‘\HII`IIIIUIIl of .\§I`It'lIIIllI`¤‘. uml iiistrilmtml in frrrtlwr-
ance of lhv work ywoviili-il for in thc .·\cL of Uivrrgrwss of llny S, 1t·14.

 •
· CONTENTS
l’:i;r· E?
History of thc discascs in Kciiluclay .... .. . . _ 1: N
\\'ilmlti1·e: H
Cause ...... H .......   .. .,.. .. ......, . ............ . .. 6 W
» Relation of wuatlivr to spi·0atl.. , , , _ T
Relation of soil conditions to sprcatl _ ~
Angular leaf·spot We . . ll Si;
Mosaic spoclvspot ., .   .. . ., ,... . T ., A 112 Wi
Control of wiltllirc anti angular lo;it`-spot: Wu
Selection of sccml 1`roni mliscasc-1`i·cc ticlllsu   lil
Protection ot` swell licatls, , ,c.,   c.... V. _ . 14 Na
Seed ti·eatn1t=nt ., ,   .... , __... . ...,cc.,..,, .1 ,. 14 Il·?l`
Other precaiitions __,,_____________________________,,,__________,_ 15 ··zl<
Diseasetl tobacco as a t`·i·i·tilizei· .........._.....,.....c..c....,. 1·5 WC`]
'l`l1»
lea
will
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ing
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CIRCULAR NO. 89
Wildfire and Angular Leaf-Spot of Tobacco
By W. D. VALLEAU ‘
Because of the widespread distribution of the leaf—sp0t dis~
eases of toliaeeo in l{entut·I<_v· in 1920, and heeause of the seri-
ous losses whieh 1't*SIlIl(‘· - 4 ’#—_. `Y   "‘“*
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Relation of Weather to Spread,
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°,‘{‘_1`~ f‘XI*0S11l§ [lin 1i»wi·i~ sielg xd im`i·<·ii¤·n. 1m`i~<·1ion did not take place
MJ WO \l]¤]>n·1‘ Sl11`ll11{’•_*, ulllm it, ton, \\‘;1s m·X[>U!<¤‘¢l.

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\ il g-1-1111o \11t*\\1("1`.  
Relation of Soil Conditions to Spread. Q
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Sl1I'l'1x :11-1·:1s :11·1· $1111I
11111 111111-1- S1lS('(‘11111)1(‘ 111:111 1111- 1:11-;:1-1- 111:1111s. '1`1l1‘ 111111-1- 1-:111111 :111
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 1 ll'i/1//in 11111/ Angular Lc¢1f-.\'po/ of Tobacco 9 ·
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mr l_ l*¥¤¤·l·· f<·ll·1w111: ll1I>¤·< 111·11 »;111s4~11 i!1·~ 1u·is11·l~;1111i lI`l`\‘<\llill' :1111><1:11‘:111v·2.
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S ill"' >lll'¤‘illllllg! 141 lllllS(‘ l1ig;·l1¢*1‘ lll), \\‘l1¢·1‘0;1x if H10 plzmls 21l‘0 Slllélll
Fillllnl z1ll1l11~l1~11v1—x will l1<· \\'lllp]N‘(l enbuut by tlw wind (llll`lll{I zi storm
11111l1- illlfl so 11ll will bo i·x]111s1·1l 111 llll.t‘L'Il(1ll. lll thc vzirly part of
l'l'll'll Tl1<‘S<*21sr111 the (liseaso is ]ll()l‘(‘ lik¢·l_v to lm fwllllll 011 H10 l2lI‘g<‘ST,
llllllll HMI v11·o11¤ plums l)(‘(‘2lllS(‘ at llliltl time they nrc not prn-
l1 Nl NCTM} from 1110 iiifeutimi by the lozivcs i11tc1·lon·ki11g amd T}10
v1—1·y l&11‘{:0, tvmlcr loaves l1illlII'2lll}' nrc blown ;1l,1011t 11101*0 by thc wind
1211** lllllll H10 small loaves nf thc $l()\\'·gI‘()\\'lllg`, loss \'ig01‘O1lS ]1lH1lTS.

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The very n;u·¤·ow. y¤~ll<»\v lllill'1Jl!l muy l»·~ seen in t··»1111·;t>L lo the ltr~*a·i
halo about the wiltltire spots. Natural sim-. ;
Ylvildfire in the field, as in the seed hed, is t·l1;a1·;1t·t··1·im·~l l‘»)‘  
the large. yellow halo spots, often lg to {ii inwh in  wj
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Ou bluek tolmeeo wildfire in its early stugxes slmws the stl;
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I ·l'·;1
    MOSAIC SPECK SPOT.
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_ I Il ,
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 eq/$1 ;
  1%,1 CONTROL OF WILDFIRE AND ANGULAR LEAF»SPOT1
  l’1‘111·111·11ll_1‘ 1·1.‘1·1·_1‘ lIIIIIII.llIII{ lll- 1l11·~1· 1ll~1·11~1·~ \1II(II\l|I Ill ?l.··
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  1‘1‘l1l1·111l_1’ IIIII IIKINIIII lll. >\`l'|I IIII.(ll`lI1III$. N1·1·1l-11111I I11I'1·1·1l1111~
-1 $.;.1 1 . . . . . .
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rx,} I .
`O Z'__ . _
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1•» ·*· . .
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~ . , , .
1.1 ig 11·1·11·1l 111 1l11· Q`l'1’1‘IlIIl\llS<‘ I1_1· \\'l‘llll|Q` 1l11·111 \\`llIl Sl 11111*1* 1·11l1111·1·
.·’  _; 111 1l11· 11’il1l111·1· 111·;;1111ix111.
 
#1 s?
  Selection of Seed From Disease-Free Fields.
**1*}  . . . . . . .
'*··i I11 1‘11·11‘ 111 1l11s 1111·1. 1·111111·11I. 11 s111·111s_ 11111s1 ('IIIININI lll 11l1.
( |‘ · · , _ ` _ . _ .
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1 11-11:11 "IIWS 111 1I11* p11s1 s1·11s1111. \\`Ilt‘lIl1‘l' NllI(`('IIIIg` s1·1·1l 1`1‘11111 2l[l]1il1`(‘llTI_\`
~<1·‘· 1l1$(*El$1‘—l.l`<‘<‘ 1i1·l1Is will Ill* 111` Ellly \'ilIlll‘ 11s il 1·111111·11l 1111*11s111·1~.

   Y
14 Cl.l'<’I(/(Il' N11. SJ}
The tobacco c1·1111 of 1919 w11s v1*1*_1· 1.1'l‘<‘ 1`1·11111 11·111'-s11111 11·111111I··1
111111 f1*o111 s111·11 1111111s 11111st of 11111 Sl‘l‘(1 1·l11' t111· 1921) ]>1l11|111IQ‘< 11,, 1
(>1)12l1l1(‘11. Scc11 1`1·11111 111c 1918 1-11111 111s11 111*111l111·1·11 w111I111·1-  
11t 1c11st 1111c 1·11sc. 111 spite 111` 111c 1.21<‘1 1|1111 111l‘ 1919 1-11111 11;,
v1·1·y frce f1*11111 1111 11·111`-s1111t 11·11111111·s, 111111 111- 11111 111|11·1· 111*  
of 111csc 111sc11scs w1*1·1* ]>1`l‘Sl‘l11 111 111·111·111·11|1_v 1111 11|11111111g1__ 1
11113 151111C.   $(`('H1N (}{)1"-(HIS {/[Ul Ni l(1'1I'l/II U1/· M11] ·/·I`1}III [/'/I1]/1;(, 1
[}(`(1)'S fl} [lf1/-1]l'.¥1‘1IS(‘-_/`l'1‘*‘_{11[1{1‘1lH)I1// {N1 I'!/IIN!-1/(I'11l (I .YlI_1·1 1;/11.
of Obflll-)1I·)Ij] 1/1`.w*11.<1‘-_/1*1*1* .11*1*1/.
Protection of S:ed—He:1ds.
1 I ].)1`01l\('111111 111` 11111 sc1·11»111111s 1.1-11111 1111`1·1·111111 111 111·111~ 111
11p11c111* 111 111* 1`1*1·1* 11*11111 1111`1·1·111111 g·11*1·s ]11.(11111\1` 11s J1 1111·11.~ ·;
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1111* scc11-111*1111 11s s111111 11s 11111 11l1\\‘(`